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CO2 Indoor Air Quality Monitor - Analox Air Quality Guardian

2 For 1! 

Add 2 Air Quality Guardians to your cart and only pay for 1!

Available for next business day shipping*

Applications: Almost anywhere, see the list of applications below 
What is it: Let's you know when you need to ventilate an area 
Single / Multi-Gas Detector: Multi 
What it measures: Carbon Dioxide (CO₂), Temperature, Humidity
Why you should buy:  Alerts you to a build up of CO2 and the need to ventilate an area 
Portable / Fixed: Portable 

Reduce the risk of airborne viruses being spread and give your people true peace of mind - give them an Air Quality Guardian.

The Air Quality Guardian is a reliable air quality monitor designed specifically to measure levels of carbon dioxide  (CO), relative humidity (RH) and temperature (temp) in your building. 

The Air Quality Guardian helps you maintain an energy efficient building. An occupied area with good ventilation will have levels of around 400-800ppm (parts per million) CO. Anything above this, you know you need to ventilate, anything below this and you may be over-ventilating and wasting energy. 

By using the Air Quality Guardian you can also ensure the health and wellbeing of those in the area. This unit uses a simple traffic light system to let you know at a glance when fresh air is needed. By ventilating, you are reducing the risk of a virus such as COVID-19 or the new SARS-CoV-2 variant now known as Omicron spreading.  

A fresh, clean air environment also increases productivity and strengthens the immune system.


With over 30 years of experience in gas sensing systems, we can offer you a total solution for air quality monitoring and alarms.

A few bits to remember:

  • Providing data it lets you know when to ventilate the area, helping to reduce the spread of airborne viruses such as COVID-19, flu and the common cold
  • It has a simple to use traffic light warning system
  • Ready to use - straight from the box
  • CE, UKCA, RoHS 2.0 and FCC compliant

*If order is placed before 2pm and is a stock item.

The Air Quality Guardian is a portable gas monitor that alerts you to dangerous levels of carbon dioxide indicating a need to ventilate the area to allow fresh air in.

A question we often get asked is:
What is the accuracy of the temperature and humidity readings?
The answer: TEMP +/- 1Deg C of reading RH +/- 5% of reading

  • Energy efficiency
  • Save time and money with self-calibration (manual calibration optional)
  • Use data logging to analyze trends in your building
  • Real time alarms
  • Helps to reduce the spread of airborne viruses' such as COVID-19, flu and the common cold
  • Improved health benefits
  • Increased productivity, reduced fatigue
  • Power failure battery backup
  • Simple and intuitive to use
  • Large back lit LCD screen  
  • Real time measurements of CO, temp and RH  levels  
  • Simple 4 button navigation  
  • Ready to use - straight from the box
  • Wall mountable or desktop 
  • Low drift NDIR (Non dispersive infra-red) CO  sensor with a long lifespan 
  • Built-in data logging 
  • Simple three-level indoor air quality indication system including: 
  • Green (under 800ppm) 
  • Amber (800ppm to 1200ppm) 
  • Red (1200ppm+) 
  • Configurable audible and visual alarms
  • Power and charge via USB 
  • 8 hour battery backup as standard 
  • Option to switch to a plant monitoring mode  (See our manual for the various options and alarm settings) 
  • Schools, Universities & Academic Buildings
  • Facilities Offices & Meeting Rooms
  • Conferences & Exhibitions 
  • Hospitals & Nursing Homes 
  • Gyms, Leisure Centres & Yoga Studio’s 
  • Labs 
  • Cannabis Grow Houses & Plant Nurseries
  • Restaurants, Fast Food & Bars 
  • Theatres, Cinemas & Stadiums 
  • Places of Worship 
  • Hotels 
  • Cruise Ships & Ferries 
  • Homes & Condos

Air Quality Guardian Datasheet

Air Quality Guardian User Manual

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